BruceyBonus
New Member
- Joined
- Jan 28, 2024
- Messages
- 3
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- Location
- Derbyshire
- Your Mercedes
- 2013 E300 Diesel Hybrid S212/ 2007 CLK63 C209
Hi all
I have a 63 plate E300 Diesel Hybrid, I believe it’s the OM651 from an E250 with a battery. Car is currently on 174k.
Last week while driving it went into limp mode, I checked the code, cleared it and continued driving and it was fine for about 2 minutes and went into limp mode again. I had a similar issue with my 640d and it was the pressure converter/transducer. My mother has an E250 so I installed that pressure converter which made no change.
Intercooler hoses have been checked and there no splits, connections for them are also dry as a bone.
The valve at the top right of the engine with a plastic arm can be moved manually so assume this is ok, the wastegate arm can also be moved manually.
My friends garage smoke tested from the pipe exiting the air filter box and the gauge showed it held pressure (I was expecting it to be the inlet manifold, either cracked or the infamous bolt head shearing off). We opened the oil filler cap and pressure dropped and smoke plumed out. He suggested this was the fault of the PCV. If there is a leak on the manifold was it not showing due to all the smoke going into the crankcase via PCV?
Question 1: Is his assumption correct/viable? (Before people say change the part and check, it’s Sunday so thought the question is worth asking and I don’t know much about PCV Valves)
Question 2: What else is a suspect part in my scenario of issues and what else would you suggest checking?
in the smoke test we noticed the seal between the MAF and air box needed replacing, could this potentially be my cause? MAF Readings are 9/gs and MAP is 14.36 on idle. While driving MAF is 40-50gs peaking at 70 on initial acceleration on a dual carriageway. After driving a while idle is 12-13.
MAP peaked at 15.8 on full load.
Car is currently always in Limp mode.
I have a 63 plate E300 Diesel Hybrid, I believe it’s the OM651 from an E250 with a battery. Car is currently on 174k.
Last week while driving it went into limp mode, I checked the code, cleared it and continued driving and it was fine for about 2 minutes and went into limp mode again. I had a similar issue with my 640d and it was the pressure converter/transducer. My mother has an E250 so I installed that pressure converter which made no change.
Intercooler hoses have been checked and there no splits, connections for them are also dry as a bone.
The valve at the top right of the engine with a plastic arm can be moved manually so assume this is ok, the wastegate arm can also be moved manually.
My friends garage smoke tested from the pipe exiting the air filter box and the gauge showed it held pressure (I was expecting it to be the inlet manifold, either cracked or the infamous bolt head shearing off). We opened the oil filler cap and pressure dropped and smoke plumed out. He suggested this was the fault of the PCV. If there is a leak on the manifold was it not showing due to all the smoke going into the crankcase via PCV?
Question 1: Is his assumption correct/viable? (Before people say change the part and check, it’s Sunday so thought the question is worth asking and I don’t know much about PCV Valves)
Question 2: What else is a suspect part in my scenario of issues and what else would you suggest checking?
in the smoke test we noticed the seal between the MAF and air box needed replacing, could this potentially be my cause? MAF Readings are 9/gs and MAP is 14.36 on idle. While driving MAF is 40-50gs peaking at 70 on initial acceleration on a dual carriageway. After driving a while idle is 12-13.
MAP peaked at 15.8 on full load.
Car is currently always in Limp mode.
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